Public water system · WI4430642
ActiveMartin Junction
At a glance
Martin Junction (PWSID WI4430642) is an active transient non-community water system in Oconto County, Wisconsin. It reports serving 50 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Martin Junction compare with other water systems in Oconto County?
By EPA's size categories, Martin Junction is a very small system (500 people or fewer). Oconto County has 202 active public water systems. Its population served is about half of the county average of 101 people per system, and accounts for 0.2% of the 20,322 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Martin Junction is about 65% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Wisconsin has 9,112 active transient non-community water systems, 82% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates Martin Junction?
EPA lists Martin Junction as privately owned. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 170 of the 202 active systems in Oconto County (84%) are also privately owned.
Does Martin Junction have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2024. The violations listed here began between January 1995 and October 2024. By type: 3 monitoring and reporting, 1 public notice, recordkeeping or other, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 5 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Martin Junction: frequently asked questions
Who runs Martin Junction?
Martin Junction (PWSID WI4430642) is a transient non-community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Martin Junction serve?
Martin Junction reports serving 50 people through 1 service connection in Oconto County, Wisconsin.
Where does Martin Junction get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Martin Junction have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Martin Junction's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2024. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Martin Junction's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Martin Junction is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Oconto County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oconto Waterworks | Oconto | 4,583 | Community | Groundwater |
| Oconto Falls Waterworks | Oconto | 2,892 | Community | Groundwater |
| Gillett Waterworks | Oconto | 1,264 | Community | Groundwater |
| Lena Waterworks | Oconto | 585 | Community | Groundwater |
| Sunnyside Elementary Sch | Oconto | 575 | Non-transient non-community | Groundwater |
| Suring Waterworks | Oconto | 517 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Martin Junction, PWSID WI4430642, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/martin-junction-wi4430642 (data as of October 1, 2026).